MAGNETIC REMANENCE IN THE WESTERN ATLANTIC SPINY LOBSTER, PANULIRUS ARGUS
MAGNETIC REMANENCE IN THE WESTERN ATLANTIC SPINY LOBSTER, PANULIRUS ARGUS
复制标题
西大西洋龙虾（阿古斯龙虾）的剩磁
DOI：
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发表时间：
1984
期刊：
影响因子：
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通讯作者：
K. Lohmann
中科院分区：
文献类型：
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作者：
K. Lohmann
用超导低温磁力仪对15只西大西洋棘龙虾（Panulirus argus）的磁场特征进行了分析。每个样品都具有明显的自然剩磁（NRM）和等温剩磁（NRM），表明存在铁磁材料。总剩磁和质量比剩磁的分布分析表明，磁性物质集中在头胸部，特别是在组织与融合的胸神经节。在头胸部和腹部的质量比剩磁和磁性物质的总量都增加作为甲壳长度的函数。NRM在身体的至少四个区域中显著定向。头胸后部左半部的NRM向后定向，而右半部的NRM向前定向。此外，中间头胸部的NRM朝向动物的右侧;尾足区域的NRM朝向左侧。这些区域的取向剩磁的功能意义是未知的，但这样的模式可能会导致从有序排列的永磁颗粒组成的磁感受器系统。
SUMMARY The magnetic characteristics of 15 western Atlantic spiny lobsters (Panulirus argus) were analysed with a superconducting cryogenic magnetometer. Each specimen possessed a significant natural remanent magnetization (NRM) and isothermal remanent magnetization (IRM), indicating that ferromagnetic material is present. Analyses of the distribution of total remanence and mass-specific remanence indicate that magnetic material is concentrated in the cephalothorax, particularly in tissue associated with the fused thoracic ganglia. Mass-specific remanence and the total quantity of magnetic material in the cephalothorax and abdomen both increase as functions of carapace length. The NRM is significantly orientated in at least four regions of the body. The NRM of the left half of the posterior cephalothorax is directed posteriorly, while that of the right half is orientated anteriorly. In addition, the NRM of the middle cephalothorax is orientated toward the right side of the animal; the NRM of the telson-uropods region is directed toward the left. The functional significance of these regions of orientated remanence is not known, but such a pattern could result from the ordered alignment of permanently magnetic particles comprising a magnetoreceptor system.